128704487 has 8 divisors (see below), whose sum is σ = 130043760. Its totient is φ = 127370880.

The previous prime is 128704427. The next prime is 128704489. The reversal of 128704487 is 784407821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128704487 - 2¹² = 128700391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128704489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55589 + ... + 57857.

It is an arithmetic number, because the mean of its divisors is an integer number (16255470).

Almost surely, 2^128704487 is an apocalyptic number.

128704487 is a deficient number, since it is larger than the sum of its proper divisors (1339273).

128704487 is a wasteful number, since it uses less digits than its factorization.

128704487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833.

The product of its (nonzero) digits is 100352, while the sum is 41.

The square root of 128704487 is about 11344.7999982371. The cubic root of 128704487 is about 504.8913101380.

The spelling of 128704487 in words is "one hundred twenty-eight million, seven hundred four thousand, four hundred eighty-seven".